GeoTIFF
GeoTIFF Metadata
GeoTIFF is a public domain metadata standard that enables georeferencing information to be embedded within an image file. The GeoTIFF format embeds geospatial metadata into image files such as aerial photography, satellite imagery, and digitized maps so that they can be used in GIS applications.
https://gis.stackexchange.com/questions/62837/understanding-geotiff-tags http://duff.ess.washington.edu/data/raster/drg/docs/geotiff.txt
TIFF
TIFF or TIF (Tagged Image Format) is an image file format for storing raster graphics images.
A TIFF file can contain multiple images, with tags pointing to each image.
The latest version is TIFF 6.0 was released on 3 June 1992.